Audio Tools

http://audacity.sourceforge.net/ open source audio editing

http://vocaroo.com/ record your voice

http://www.hearwho.com/default.aspx changes text to voice, great for ELL students

http://lab.andre-michelle.com/tonematrix Tone matrix fun music exploration tool

http://www.aviary.com/tools/music-creator Mina is an audio editing tool similar to Garage Band online

http://soundation.com/ powerful online music studio